Buena, who left Sugababes in 2005, told BBC 6music that she believed that the group was effectively defunct because of the switch.

“It kind of doesn’t make sense that there is Sugababes any more. I don’t know if it’s just me, but Keisha being the original that was left out of the band, her leaving doesn’t make it Sugababes really,” she explained.

She added: “I don’t know how they replace her or carry on without her. I just think it’s really sad. To me it just means the Sugababes have ended really, not in a bad way, but because there are no original people remaining.”

The singer added that now Buchanan had left any chances of her rejoining the band for a live performance were gone.

“If Keisha was still in the Sugababes, I would have blatantly gone in there and done a few shows with them just because it’s been a few years,” she said. “But now Keisha‘s left I just don’t feel interested any more. It’s kind of taken the excitement away that one day we’d be able to go on stage and sing again together.”

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